package com.pactera.madp.cp.config;

import com.pactera.madp.cp.common.constant.Constants;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 线程池配置
 *
 * @author madp
 * @version 3.0.0
 * @since 2022/01/12 16:30
 */
@Configuration
public class AsyncConfiguration {

	/**
	 * 数据采集消息消费线程池
	 * @return
	 */
	@Bean(Constants.EXECUTOR_PROCESS_NAME)
	public Executor processExecutor(){
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		// 核心线程数：线程池创建时候初始化的线程数
		executor.setCorePoolSize(5);
		// 最大线程数：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
		executor.setMaxPoolSize(10);
		// 缓冲队列：用来缓冲执行任务的队列
		executor.setQueueCapacity(Byte.MAX_VALUE);
		// 允许线程的空闲时间60秒：当超过了核心线程之外的线程在空闲时间到达之后会被销毁
		executor.setKeepAliveSeconds(60);
		// 线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
		executor.setThreadNamePrefix(Constants.EXECUTOR_PROCESS_THREAD_NAME_PREFIX);
		// 缓冲队列满了之后的拒绝策略：由调用线程处理（一般是主线程）
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
		executor.initialize();
		return executor;
	}
}
